“Invalid signature file” when attempting to run a .jar

Question

My java program is packaged in a jar file and makes use of an external jar library, bouncy castle. My code compiles fine, but running the jar leads to the following error:

Answer 1

I faced the same issue, after reference somewhere, it worked as below changing:

    org.apache.maven.plugins
    maven-shade-plugin
    3.2.1
    
        false
    
    
        
            package
            
                shade
            
            
                
                    
                        *:*
                        
                            META-INF/*.SF
                            META-INF/*.DSA
                            META-INF/*.RSA